The Swiss player began his ice hockey career with SC Bern. Roman has been playing in the NHL for the Nashville Predators since 2010 and has been the team's captain since 2017. He is one of the world's best defenders and has received numerous awards. Since 2009, he has been a regular member of the Swiss national ice hockey team at World Championships and Olympic Games. In 2013 and 2014, he was selected for the World Championship All-Star Teams. He came into contact with micronutrients and kingnature early in his career through summer training with Simon Holdener. Roman is known to place great importance on a healthy diet. He avoids processed foods, sugary drinks and unhealthy fats. Instead, he focuses on a protein-rich diet and adequate hydration to maintain his energy and endurance. In addition, Josi worked with the Legacy Sport & Wellness Centre in Dallas in the summer of 2024 to develop a personalised training programme. The centre places great emphasis on holistic health, including nutrition, hydration and recovery. Roman Josi takes a comprehensive approach to optimising his performance, and this continues to pay off today.